or just ventilation for heat dissipation. Olympus just would not pass up the chance to make some extra dollars, even when it is compromising what is a very nice flagship camera. Short-sighted.

I disagree. Olympus give you a choice, which is good. An integrated grip deprives you of that choice.

I have used an OM4-Ti for years - which even with the minimalist add-on grip has less grip than the EM-5 in bare form. I have never had a handling issue with it or wanted it to have a handle and more bulk.

I also have had no issue with the E-M5 as it is and appreciate it's minimalism. I am getting the grips because of the free offer and will give them a go, but I suspect I might end up putting them on eBay.